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Constituting the income of discontinued operations (Details) - USD ($)
$ in Thousands
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Carrying amounts of major classes of assets included as part of discontinued operations:      
Cash and cash equivalents $ 0 $ 831 $ 0
Trade accounts receivable, net of allowance for doubtful accounts   998  
Inventories   566  
Other current assets   239  
Fixed assets, net   146  
Non-amortizable intangibles   580  
Intangibles, net of accumulated amortization   1,387  
Goodwill   1,879  
Total assets included in Comnet sale   6,626  
Carrying amounts of major classes of liabilities included as part of discontinued operations:      
Accounts payable   320  
Other liabilities   451  
Total liabilities included in Comnet sale $ 0 $ 771